FTDNA Y-tree branch

Haplogroup J-BY37989

J-BY37989 is a branch of the FamilyTreeDNA Y tree with 50 kits that gave a country, counting all sub-branches. It is most common in these samples: Romania (0.7% of kits), Ukraine (0.2% of kits), Poland (0.1% of kits). The branch's common ancestor lived about 3,300 years ago: the FTDNA Discover estimate runs from 2,700 to 3,900 years ago. YFull has 19 samples in this branch and dates its common ancestor to 3,200 years ago.

Belongs to the J-M410 branch, which has a note.

Compare with another branch →

This branch on other trees: FTDNA Discover ↗ · YFull ↗

Branch SNPs: 2 · 29 more at YFull

BY37989, Y166603

YFull nodes on this branch and their SNPs that FTDNA does not have:

J-Y166616 · J-Y166616
Y651028, Y651030(H), Y651031(H), Y586542(H), Y662931(H), Y490897(H)
J-Y36257 · J-BY37931
Y37130, Y223005, BY26347, Y166596, Y166618, BY37925, BY78569, Y37131, BY78577
J-Y62114 · J-Y62114 · 4 samples
J-BY37989 · 2 samples
J-BY73001 · J-BY73001 · 2 samples
J-S24712 · J-S24712 · 2 samples
J-Y100648 · J-Y100648 · 1 sample
J-Y157613 · J-BY179290 · 1 sample
J-Z43501 · J-Z43501 · 1 sample
J-Y37127 · J-BY37931
J-Y37133 · J-Y37133
J-Y298613 · J-Y166616 · 2 samples · FTDNA has no branch for it; we count it here
Y298621, Y298620, Y298619, Y298618, Y298616, Y298613, Y298617, Y298615, Y298614
and 3 more

kits with a country

sub-branches included; 87 kits in the branch in all, 37 without a country

on the branch itself

with a country, the test did not resolve a sub-branch; 1 on the branch itself in all, those without a country included

85%

Big Y

74 of 87: every kit of the branch with sub-branches, those without a country included

sub-branches

0 with their own page, 3 without

samples at FTDNA Discover

49 with a country; the public tree has 87 kits

3,300 years

age by Discover

the common ancestor lived 2,700 to 3,900 years ago

3,200 years

age by YFull

common ancestor (TMRCA); the branch split from its parent 3,200 years ago

Where it is found #

Countries and regions given by the branch's carriers. “Share of branch” is the part of the branch's kits that belongs to the country. “Share of country” is the part of that country's kits that falls into the branch; it is computed only for countries with at least 50 kits.

Colour is the branch's share of the country's kits. Hover over a country or tap it.

Where it is found
Country / region	kits	Share of branch	Share of country
Poland	8	16.0%	0.1%
Romania	8	16.0%	0.7%
Ukraine	7	14.0%	0.2%
Belarus	3	6.0%	3 of 1,718
England	3	6.0%	3 of 27,808
Germany	3	6.0%	3 of 17,572
Hungary	3	6.0%	3 of 1,921
Lithuania	3	6.0%	3 of 1,866
Czech Republic	2	4.0%	2 of 2,369
Latvia	2	4.0%	2 of 456
Austria	1	2.0%	1 of 1,085
Moldova	1	2.0%	1 of 193
Morocco	1	2.0%	1 of 568
Russian Federation	1	2.0%	1 of 7,192
Slovakia	1	2.0%	1 of 982
Spain	1	2.0%	1 of 3,939
Tunisia	1	2.0%	1 of 252
United States	1	2.0%	1 of 30,866

YFull

Most common among these peoples #

From YFull samples that gave a mother tongue: the part of a people's samples that falls into this branch. The list has peoples with at least 30 samples, 3 or more of them in this branch.

English: 0.3% of samples (3 of 1,054)

Sub-branches #

Sub-branches that have their own page (50 kits or more), as a tree: every direct one, nested ones from 1% of the branch's kits. The bar is the kits in the sub-branch with its own sub-branches; the age is when its common ancestor lived.

No sub-branch has its own page: only small branches lie below.

Also 2 small sub-branches of under 5 kits: 3 kits in all.

Sub-branches without a page #

Each of these sub-branches has fewer than 50 kits with a country, so none has its own page. Below are all with 5 or more kits, with their age and top countries.

J-Z43501 47 kits 1,400 years Poland 8, Romania 7, Ukraine 7
J-BY37931 37 kits 1,000 years Romania 7, Poland 6, Ukraine 5
J-FGC19169 20 kits 900 years Romania 7, Poland 5, England 2
J-BY73001 11 kits 700 years Romania 7, Poland 2, Moldova 1
J-Y16394 9 kits 500 years Romania 7, Moldova 1, Ukraine 1
J-CTS3243 8 kits 400 years Romania 7, Moldova 1
J-FTA528 6 kits 200 years Romania 6
J-FT253561 6 kits 500 years England 2, Czech Republic 1, Germany 1
J-Y37133 15 kits 800 years Ukraine 4, Belarus 3, Lithuania 3
J-Y100648 9 kits 600 years Belarus 3, Lithuania 2, Czech Republic 1
J-BY178703 6 kits 400 years Belarus 3, Lithuania 2, Latvia 1
J-BY93997 7 kits 800 years Germany 2, Poland 2, Ukraine 2
J-Y62114 7 kits 700 years Germany 2, Poland 2, Ukraine 2
J-BY41091 6 kits 600 years Germany 2, Ukraine 2, Austria 1

How old the branch is, by source #

Each source's estimate on one scale, in years ago. A dot is the estimate, a bar its spread (a 95% interval for YFull); no bar means the source publishes no spread. The “common ancestor” rows show when the last common ancestor of all carriers lived, the “split” rows when the branch broke off from its parent. Discover does not estimate the split, so its row shows the age of the parent branch itself.

FTDNA Discover common ancestor3,300 years (2,700–3,900)

YFull common ancestor3,200 years (2,500–4,000) · 19 samples

FTDNA Discover split from the parent3,300 years (2,800–3,900)

YFull split from the parent3,200 years (2,500–4,000) · 19 samples

How the branch grew #

How many sub-branches already existed at each moment: a sub-branch counts from the time its common ancestor lived (FamilyTreeDNA Discover estimates). Sub-branches with a known age: 43.

explosive growth: the number of sub-branches doubles in under 400 yearsgrowth: the number doubles in 400–1,500 yearsstagnation: no doubling within 1,500 yearsgrey: fewer than 5 sub-branches at the start of a stretch — too little to tell the rate

Across: years ago; up: number of sub-branches, log scale. The shaded band marks the period when the count multiplied most; the last thousand years are left out.

Sub-branches of the last centuries show up only where many relatives have tested, so the right end of the curve says more about who took a test than about population growth.

New this month #

FTDNA: how much the kit count grew between the tree copies of 2026-10-02 and 2026-11-02. A kit that moved to a new sub-branch after refinement is not counted as new. YFull: samples YFull itself marks as new, in the copy of 2026-11-02; YFull drops the mark after a few weeks.

Y-DNA, FTDNA

new kits, 2026-10-02 → 2026-11-02

Where it grew

Hungary: +1
Ukraine: +1

Surnames #

Surnames that testers entered at FTDNA, over the whole branch with its sub-branches: 2 distinct among 8 kits. FTDNA gives surnames per branch only, with no country attached, so they cannot be split by country.

Yurowitz 5
Lebovits 3